idTech4.UI.idEditWindow.EnsureCursorVisible C# (CSharp) Méthode

		private void EnsureCursorVisible()
		{
			if(_readOnly == true)
			{
				_cursorPosition = -1;
			}
			else if(_maxChars == 1)
			{
				_cursorPosition = 0;
			}

			if(this.DeviceContext == null)
			{
				return;
			}

			SetFont();

			if(_wrap == false)
			{
				int cursorX = 0;

				if(_password == true)
				{
					cursorX = _cursorPosition * this.DeviceContext.GetCharacterWidth('*', this.TextScale);
				}
				else
				{
					int i = 0;
					int length = this.Text.Length;

					while((i < length) && (i < _cursorPosition))
					{
						if(idHelper.IsColor(this.Text, i) == true)
						{
							i += 2;
						}
						else 
						{
							cursorX += this.DeviceContext.GetCharacterWidth(this.Text[i], this.TextScale);
							i++;
						}
					}
				}

				int maxWidth = (int) this.MaximumCharacterWidth;
				int left = cursorX - maxWidth;
				int right = (int) (cursorX - this.TextRectangle.Width) + maxWidth;

				if(_paintOffset > left)
				{
					// when we go past the left side, we want the text to jump 6 characters
					_paintOffset = left - maxWidth * 6;
				}

				if(_paintOffset < right)
				{
					_paintOffset = right;
				}

				if(_paintOffset < 0)
				{
					_paintOffset = 0;
				}

				_scroller.SetRange(0, 0, 1);
			}
			else 
			{
				// word wrap
				_breaks.Clear();

				idRectangle rect = this.TextRectangle;
				rect.Width -= _sizeBias;

				this.DeviceContext.DrawText(this.Text, this.TextScale, this.TextAlign, idColor.White, rect, true, ((this.Flags & WindowFlags.Focus) == WindowFlags.Focus) ? _cursorPosition : -1, true, _breaks);

				int fit = (int) (this.TextRectangle.Height / (this.MaximumCharacterHeight + 5));

				if(fit < (_breaks.Count + 1))
				{
					_scroller.SetRange(0, _breaks.Count + 1 - fit, 1);
				}
				else
				{
					// the text fits completely in the box
					_scroller.SetRange(0, 0, 1);
				}

				if(_forceScroll == true)
				{
					_scroller.Value = _breaks.Count - fit;
				}
				else if(_readOnly == true)
				{

				}
				else
				{
					_cursorLine = 0;
					int count = _breaks.Count;

					for(int i = 1; i < count; i++)
					{
						if(_cursorPosition >= _breaks[i])
						{
							_cursorLine = i;
						}
						else
						{
							break;
						}
					}

					int topLine = (int) _scroller.Value;

					if(_cursorLine < topLine)
					{
						_scroller.Value = _cursorLine;
					}
					else if(_cursorLine >= (topLine + fit))
					{
						_scroller.Value = (_cursorLine - fit) + 1;
					}
				}
			}
		}